mm305 business statistics and quantitative analysis 2
Read a classmate’s response. Consider investing in your classmate’s stock and assume that the daily change is normally distributed. Using the Normal Distribution Excel template found in Unit 4 LiveBinder, your classmate’s mean and standard deviation, determine the probability for the daily change of this stock to have:
1. A decrease of 0.5 point or more (X ≤ -0.5)?
2. An increase of more than 0.5 point (X > 0.5)?
3. A decrease of 1 point or more (X ≤ -1)?
4. An increase of more than 1 point (X > 1)
Adjust automatic marking as read setting
- I chose the stock for Xcel Energy, Inc.
- The daily change of this stock is:
|
Date |
Open |
High |
Low |
Close |
Adj Close |
Volume |
Daily Change |
|
2/7/2020 |
69.49 |
69.54 |
68.7 |
68.71 |
68.26784 |
2316900 |
-0.78 |
|
2/10/2020 |
68.91 |
69.12 |
68.54 |
69.06 |
68.61559 |
2306300 |
0.149994 |
|
2/11/2020 |
69.06 |
69.23 |
68.84 |
68.96 |
68.51623 |
2176200 |
-0.1 |
|
2/12/2020 |
68.75 |
69.25 |
68.55 |
69.03 |
68.58578 |
2032500 |
0.279999 |
|
2/13/2020 |
69.08 |
69.89 |
68.92 |
69.82 |
69.37069 |
2430700 |
0.739998 |
|
2/14/2020 |
69.99 |
70.4 |
69.77 |
70.26 |
69.80786 |
1959400 |
0.270004 |
|
2/18/2020 |
70.63 |
71.43 |
70.57 |
71.16 |
70.70207 |
3552200 |
0.530007 |
|
2/19/2020 |
70.94 |
71.24 |
70.77 |
70.79 |
70.33445 |
2284500 |
-0.15 |
|
2/20/2020 |
70.74 |
70.99 |
70.19 |
70.67 |
70.21523 |
2243900 |
-0.07 |
|
2/21/2020 |
70.72 |
71.42 |
70.44 |
70.82 |
70.36426 |
3563600 |
0.099999 |
|
2/24/2020 |
71.69 |
72.14 |
70.22 |
70.37 |
69.91716 |
3531000 |
-1.32 |
|
2/25/2020 |
70.48 |
70.65 |
68.73 |
68.84 |
68.397 |
3581800 |
-1.64001 |
|
2/26/2020 |
69.32 |
69.49 |
68.32 |
68.35 |
67.91015 |
3060200 |
-0.97 |
|
2/27/2020 |
68.33 |
68.67 |
64.81 |
64.85 |
64.43268 |
4225400 |
-3.48 |
|
2/28/2020 |
64.08 |
64.08 |
61.25 |
62.32 |
61.91896 |
7762100 |
-1.76 |
|
3/2/2020 |
62.22 |
65.99 |
62.15 |
65.87 |
65.44611 |
5117800 |
3.650002 |
|
3/3/2020 |
65.42 |
67.46 |
65.2 |
65.71 |
65.28714 |
5425200 |
0.290001 |
|
3/4/2020 |
66.53 |
69.41 |
66.06 |
69.2 |
68.75468 |
3454200 |
2.669998 |
|
3/5/2020 |
67.84 |
70.02 |
67.45 |
69.25 |
68.80436 |
5871800 |
1.410004 |
|
3/6/2020 |
66.51 |
70.16 |
66.23 |
70.15 |
69.69857 |
6689400 |
3.64 |
|
3/9/2020 |
66.36 |
69.99 |
65.3 |
67.99 |
67.55247 |
9885200 |
1.629997 |
|
3/10/2020 |
68.55 |
70.68 |
66.1 |
68.49 |
68.04925 |
8897400 |
-0.06001 |
|
3/11/2020 |
67.03 |
68.23 |
65.63 |
66.82 |
66.39 |
5815100 |
-0.21 |
|
3/12/2020 |
63.06 |
66.98 |
59.57 |
61.29 |
61.29 |
7310900 |
-1.77 |
|
3/13/2020 |
63.37 |
66.85 |
61 |
66.84 |
66.84 |
5724700 |
3.469997 |
|
3/16/2020 |
60.86 |
67 |
57.41 |
58.36 |
58.36 |
7884300 |
-2.5 |
|
3/17/2020 |
59.74 |
67.26 |
59.64 |
64.93 |
64.93 |
8959300 |
5.189998 |
|
3/18/2020 |
61.49 |
64 |
57.67 |
61.37 |
61.37 |
6690300 |
-0.12 |
|
3/19/2020 |
61.53 |
62.48 |
57.24 |
57.99 |
57.99 |
6840300 |
-3.54 |
|
3/20/2020 |
59 |
59.15 |
50.03 |
50.63 |
50.63 |
9147400 |
-8.37 |
- The descriptive statistics summary table:
|
Daily Change |
|
|
Mean |
-0.0940006 |
|
Standard Error |
0.469059349 |
|
Median |
-0.0650025 |
|
Mode |
#N/A |
|
Standard Deviation |
2.569143864 |
|
Sample Variance |
6.600500194 |
|
Kurtosis |
2.919792966 |
|
Skewness |
-0.759032478 |
|
Range |
13.559997 |
|
Minimum |
-8.369999 |
|
Maximum |
5.189998 |
|
Sum |
-2.820018 |
|
Count |
30 |
- Here is my 5-Number Summary:
|
Five Number Summary |
|
|
Minimum |
-8.37 |
|
First quartile |
-1.2325 |
|
Median |
-0.065 |
|
Third quartile |
0.6875 |
|
Maximum |
5.189998 |
- The Box & Whiskers Plot does not look very symmetric
- The Mean, Xbar= -0.094 < Median -0.065
From this information and also the box plot, you can tell my daily stock price is not symmetric but instead slightly left-skewed.
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